Initial commit

backend/app/services/market_clock.py

@@ -0,0 +1,21 @@
+from datetime import datetime, time
+from zoneinfo import ZoneInfo
+
+from app.api.schemas import MarketState
+
+
+def get_market_state(now: datetime | None = None) -> MarketState:
+    current = now or datetime.now(ZoneInfo("Asia/Shanghai"))
+    current_time = current.time()
+
+    if current_time < time(9, 30):
+        return "pre_open"
+    if time(9, 30) <= current_time < time(12, 0):
+        return "trading_am"
+    if time(12, 0) <= current_time < time(13, 0):
+        return "midday_break"
+    if time(13, 0) <= current_time < time(16, 0):
+        return "trading_pm"
+    if time(16, 0) <= current_time < time(16, 10):
+        return "finalizing"
+    return "closed"